Inspection Of Lens-Servo Stop Accuracy - Nikon ED 17-55mm f/2.8G IF Repair Manual

（３）Inspection of lens-servo stop accuracy
INSPECTION OF DRIVING STOP ACCURACY.
NUMBER OF LENS GO-AND-RETURN OPERATIONS.
①
LENS DRIVING TIMES.
MAXIMUM PULSE.(ABSOLUTE) (DF0+DF1+DF2+DF3+DF4+DF5+DF6)
OVER ( OR UNDER ) RUN PULE(S).
LENS DRIVING TIMES：DF1=30 DF2=30 DF3=30 DF4=30 DF5=30 DF6=20
DIRECTION
AMOUNT
UNDER(-), OVER(+)
0 - 5
6 - 15
10 - 15
16 -
④
DIRECTION
AMOUNT
UNDER(-),OVER(+)
0 - 5
6 - 15
10 - 15
16 -
⑤
RATIO(1)
②
RATIO(2)
③
PUSH CANCEL TO RETURN TO FOCAL DISTANCE SET-UP MENU.
Caution：If the MF ring is rotated while the lens scanning is driven, the pulse shows an abnormal value. Do NOT
touch the MF ring during operations.
During the lens driving, the above screen is displayed. Make inspections at the 5 positions as below.
Front lens group 90° upward
Front lens group 90° downward
The number of overrun/underrun pulses must be within the standards after the 5 lens back-and forth driving motions
("5/5TIME (S)." in [1] of the display).
RATIO (1) is 40% or less for Df1~Df6.
Standard
(Occurrence ratio of 6~15 pulses)
RATIO (2) is 10% or less for Df1~Df6.
(Occurrence ratio of 10~15 pulses)
Occurrence of 16 or more pulses is zero for Df1~Df6.
(Only one occurrence indicates malfunction.)
※ "Df1~Df6" shows the lens driving amount.
(DF0+DF1+DF2+DF3+DF4+DF5+DF6)
: INF‐〉CLOSE CLOSE‐〉INF
: DF1 DF2 DF3
: (-) (+) (-) (+) (-) (+)
: 0 10 0 10 2
: 0 0 0 0 0
: 0 0 0 0 0
: 0 0 0 0 0
: INF‐〉CLOSE
: DF4 DF5 DF6
: (-) (+) (-) (+) (-) (+)
: 0 10 0 5 0
: 0 0 0 0 0
: 0 0 0 0 0
: 0 0 0 0 0
(%)：Df1=0.00 Df2=0.00 Df3=0.00 Df4=0.00 Df5=0.00 Df6=0.00
(%)：Df1=0.00 Df2=0.00 Df3=0.00 Df4=0.00 Df5=0.00 Df6=0.00
(Lens position in inspecting)
Lens inclination Position of index window
Horizontal
- L52 ･ AF-S DX17-55/2.8G -
： 5 / 5 TIME(S).
： 85 TIME(S).
： 3 PULSE(S).
： - 1 PULSE(S).
DF1 DF2 DF3
(-) (+) (-) (+) (-) (+)
8 3 2 5 0 5 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
CLOSE‐〉INF
DF4 DF5 DF6
(-) (+) (-) (+) (-) (+)
5 5 0 5 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
Up, right and left
INC
JAA78851-R.3617.A
CANCEL
② of the screen
③ of the screen
④ and ⑤ of the screen